1 files changed, 152 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-final/java/sca/tomcat/src/main/java/org/apache/tuscany/tomcat/TuscanyContextListener.java b/sca-java-1.x/tags/java-M1-final/java/sca/tomcat/src/main/java/org/apache/tuscany/tomcat/TuscanyContextListener.java
new file mode 100644
index 0000000000..7e3edf67f9
--- /dev/null
+++ b/sca-java-1.x/tags/java-M1-final/java/sca/tomcat/src/main/java/org/apache/tuscany/tomcat/TuscanyContextListener.java
@@ -0,0 +1,152 @@
+/**
+ *
+ * Copyright 2005 The Apache Software Foundation
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+package org.apache.tuscany.tomcat;
+
+import javax.servlet.ServletContext;
+
+import org.apache.catalina.Context;
+import org.apache.catalina.Lifecycle;
+import org.apache.catalina.LifecycleEvent;
+import org.apache.catalina.LifecycleListener;
+import org.apache.catalina.util.StringManager;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.tuscany.common.resource.ResourceLoader;
+import org.apache.tuscany.common.resource.impl.ResourceLoaderImpl;
+import org.apache.tuscany.core.client.BootstrapHelper;
+import org.apache.tuscany.core.config.ConfigurationException;
+import org.apache.tuscany.core.config.ModuleComponentConfigurationLoader;
+import org.apache.tuscany.core.context.CompositeContext;
+import org.apache.tuscany.core.context.EventException;
+import org.apache.tuscany.core.context.event.ModuleStart;
+import org.apache.tuscany.core.context.event.ModuleStop;
+import org.apache.tuscany.core.runtime.RuntimeContext;
+import org.apache.tuscany.model.assembly.AssemblyFactory;
+import org.apache.tuscany.model.assembly.ModuleComponent;
+import org.apache.tuscany.model.assembly.impl.AssemblyContextImpl;
+import org.apache.tuscany.model.assembly.loader.AssemblyModelLoader;
+
+/**
+ * @version $Rev$ $Date$
+ */
+public class TuscanyContextListener implements LifecycleListener {
+    private static final Log log = LogFactory.getLog(TuscanyContextListener.class);
+    private static final StringManager sm = StringManager.getManager("org.apache.tuscany.tomcat");
+    private static final String TUSCANY_RUNTIME_NAME = RuntimeContext.class.getName();
+    public static final String MODULE_COMPONENT_NAME = "org.apache.tuscany.core.webapp.ModuleComponentContext";
+
+    private final AssemblyFactory modelFactory;
+    private final AssemblyModelLoader modelLoader;
+    private final RuntimeContext runtime;
+    private CompositeContext moduleContext;
+    private TuscanyValve valve;
+
+    public TuscanyContextListener(RuntimeContext runtimeContext, AssemblyFactory modelFactory, AssemblyModelLoader modelLoader) {
+        this.runtime = runtimeContext;
+        this.modelFactory = modelFactory;
+        this.modelLoader = modelLoader;
+    }
+
+    public void lifecycleEvent(LifecycleEvent event) {
+        String type = event.getType();
+        if (Lifecycle.AFTER_START_EVENT.equals(type)) {
+            startContext((Context) event.getLifecycle());
+        } else if (Lifecycle.STOP_EVENT.equals(type)) {
+            stopContext((Context) event.getLifecycle());
+        }
+    }
+
+    private void startContext(Context ctx) {
+        ClassLoader appLoader = ctx.getLoader().getClassLoader();
+        if (appLoader.getResource("sca.module") == null) {
+            return;
+        }
+
+        log.info(sm.getString("context.configLoad", ctx.getName()));
+        try {
+            loadContext(ctx);
+        } catch (ConfigurationException e) {
+            log.error(sm.getString("context.configError"), e);
+            // todo mark application as unavailable
+            return;
+        }
+
+        try {
+            moduleContext.publish(new ModuleStart(this));
+        } catch (EventException e) {
+            log.error(sm.getString("context.moduleStartError"), e);
+            // todo unload module component from runtime
+            // todo mark application as unavailable
+            return;
+        } catch (RuntimeException e) {
+            log.error(sm.getString("context.unknownRuntimeException"), e);
+            // todo unload module component from runtime
+            throw e;
+        }
+
+        // add a valve to this context's pipeline that will associate the request with the runtime
+        if (valve == null) {
+            valve = new TuscanyValve(moduleContext);
+        } else {
+            valve.setContext(moduleContext);
+            valve.setEnabled(true);
+        }
+        ctx.getPipeline().addValve(valve);
+        // add the RuntimeContext in as a servlet context parameter
+        ServletContext servletContext = ctx.getServletContext();
+        servletContext.setAttribute(TUSCANY_RUNTIME_NAME, runtime);
+        servletContext.setAttribute(MODULE_COMPONENT_NAME, moduleContext);
+    }
+
+    private void loadContext(Context ctx) throws ConfigurationException {
+        ResourceLoader resourceLoader = new ResourceLoaderImpl(ctx.getLoader().getClassLoader());
+        ClassLoader oldCl = Thread.currentThread().getContextClassLoader();
+        Thread.currentThread().setContextClassLoader(getClass().getClassLoader());
+        try {
+            AssemblyContextImpl modelContext = new AssemblyContextImpl(modelFactory, modelLoader, resourceLoader, ctx.getName());
+
+            ModuleComponentConfigurationLoader loader = BootstrapHelper.getConfigurationLoader(runtime.getSystemContext(), modelContext);
+
+            // Load the SCDL configuration of the application module
+            ModuleComponent moduleComponent = loader.loadModuleComponent(ctx.getName(), ctx.getPath());
+
+            // Register it under the root application context
+            CompositeContext rootContext = runtime.getRootContext();
+            rootContext.registerModelObject(moduleComponent);
+            moduleContext = (CompositeContext) rootContext.getContext(moduleComponent.getName());
+            //TODO remove the hack below
+            moduleContext.setAssemblyContext(modelContext);
+        } finally {
+            Thread.currentThread().setContextClassLoader(oldCl);
+        }
+    }
+
+    private void stopContext(Context ctx) {
+        if (moduleContext != null) {
+            moduleContext.publish(new ModuleStop(this));
+        }
+        CompositeContext rootContext = runtime.getRootContext();
+        rootContext.removeContext(moduleContext.getName());
+        valve.setEnabled(false);
+        //ctx.getPipeline().removeValve(valve);
+        //valve = null;
+        moduleContext.stop();
+        moduleContext = null;
+        // todo unload module component from runtime
+    }
+
+}